Question

What’s an efficient way to format an array in PHP as a list with commas and the word “and” before the last element?

$array = Array('a','b','c','d');

I want to produce the string “a, b, c, and d”

Answer 1

I would modify the $array in place to add the "and", and then join the parts with commas for output:

array_push($array, " and " . array_pop($array));
print join(", ", $array);

But you might as well just use array_pop to separate the last entry, join the rest, and then append the “and” and last entry.